\usemodule[visual]

\setscript[hanzi]
\setupalign[hanging, hz]

\usemodule[zhfontsext]
\usetypescript[cnfontb]
\setupbodyfont[cnfontb,rm,12pt] % 小四号 = 12pt
\mainlanguage[cn]


\setuplayout[header=1cm,footer=1cm,topspace=1cm,bottomspace=1cm,cutspace=2cm,leftmargin=2cm,backspace=2cm,rightmargin=2cm]
\setuppagenumbering [location=]


\setupheader
  [text]
  [lefttext=左,righttext=右,
  before={\startframed[frame=off,bottomframe=on,framecolor=blue]},
   after={\stopframed},
  ]

\starttext
    \fakewords{20}{30} 
\stoptext





 